Multi-atom resonant X-ray emission in simple binary compounds

摘要

Multi-atom resonance (MAR) is a phenomenon where core-electron emission from an atom is perturbated by the core-to-valence resonant excitation in the neighboring atom. Here, MAR's in simple binary compounds were investigated both for solid and aqueous solution. For solid CaCl_2, it was found that the intensity of Cl Kα X-rays was reduced when the energy of the incident X-rays was tuned at the resonance energy of the neighboring Ca K-edge, but such intensity reduction was not observed for aqueous solution of CaCl_2. Similar results were also obtained for the KC1 and SrCl_2. Since we can determine the atomic species of the neighboring atom by this method, the observed phenomena will pave a way to a new structural analysis that is complimentary to the synchrotron-based X-ray spectroscopies such as extended X-ray absorption fine structure (EXAFS) and X-ray absorption near-edge structure (XANES).